Cylinder lock



Oct. 7, 1930. J. HINES 1,771,125-

CYLINDER LOCK Filed May 18, 1929 Fig.1.

INVENTOR. m.) ma

W I I ATTO NEYS.

Patented Oct. 7, 1930 units srarss JOHN HINFS, OF ASTORIA, NEW YORK, ASSIGNOR T OSEGAL LOOK HARDWARE GO.

PATENT OFFICE INCL, OF NEW YORK, N. Y., .A. CORPORATION OF NEW YORK CYLINDER Loan Application filed May 18,

This invention relates to a lock and in its more specific aspects, aims to provide a device of this character in. which difiiculties heretofore experienced will be avoided and by means of which, moreover, a functionally andstructurally improved form of mechanism will be presented.

, More specifically stated, by means of the present invention-y-and when the same is applied to a lock of the cylinder typethe result is achieved that the cylinder will be in capable of detachment from the lock casing or its associated structureexoept by an authorized person. By such a person, however, it

, may readily be removed for the purposesof adjustment, repair and replacement.

A. furtlier object is that of furnishing a device of this type which may be actuated with facility and which will embody relativei .ly few parts individually simple and rugged in construction, these partsbeing capable of being assembled readily in the form of a unitary structure which may be sold at a relatively nominal figure and which will render efiicient service over long periods of time with freedom from mechanical difiiculties.

. With these and further objects in mind,

reference is had to the attached sheet of drawings illustrating practical embodiments of the invention and in which:

Fig. 1 is a'sectional side view of a door with a lock applied thereto;

Fig. 2 is a rear View of the cylinder and plug associated therewith;

Fig. 3 shows that portion of the plate with which said cylinder is associated; V

Fig. 4: is a sectional side view of the parts asshown in Figs. 2 and 8, this View being taken along the lines 4-4 and in the direcbut showing diiferent positions and arrange ments of the parts; and

. Fig. 9 1s a transverse sect1on taken along 1929. Serial No. 36 4,24&

line 9-9 and in'the direction of the arrows of Fig. 8. l 7 l i In these several views, the numeral 10 indicates the closure with which a lock casing 11 of any desirabletype and housing any conw venient form of mechanism is associated. Extending from this casing is a lockcylinder 12 containing a plug 13, and the latter being connected by any suitable form of tail piece or throwing lever 14 with the mechanism of the lock. 1

The foregoing represents more or less conventional construction and isadopted merely by way of illustration. 7 To those skilled in the art, it is well-knownthat it has been customary, to provide the casing 11 or the, plates associated therewith with "openings interiupon the tail piece is connected to the lockmechanism and movement between the cylin}, der and eas ng have heretoforebeen prevented by means of a screw 16 extending from the face plate of the casing to a point at which it engages the periphery of the cylinder. a i

By means of the construction of the present invention, it is proposed tosupplement the action of this locking screwor to substitute therefor an additional locking expedient. One form which the invention may take has been shown in Figs. 4, 5, 6 and 8 it being noted in these views that a piece of metal 17 is stamped out to provide a bulged portion 18 and that the body of the cylinderl is formed with a slot 19 and a bore/2O at a point to one side of the line of tumblers, the latter having not beennshown.v ,The body of the strip 17 is of suchwidth that it is slid ably accommodatedwithin the slot 19 and may be wholly housed therein. Incident to. the bulged portion 18 however, the strip may. not ride from within the slot, it being necessary. in order to accomplish removal thereof that the strip be drawn rearwardly to a point" p at which the bulgedportionlS of the same rides clear of the rear end of the bore. This bore is screw threaded to accommodate the threaded body of a plug 21, the forward end of which is tapered as at 22 to bear against the inclined edge 23 of the strip 17. It is thus obvious that if the cylinder is positioned, an operator by simply turning down the plug 21 will cause the strip 17 to be rocked outwardly to the position shown in Fig. t in which it acts as a locking dog with its edges biting into the threads of the plate opening or as shown, this element may ride within a recess 24 formed in the edge of the plate opening. As aforestated this locking action maybe supplemented by the conventional screw 16, if this is desired, but in any event, it will be obvious that only by extending a screw driver or other suitable instrument from the inner face of the door and into engagement with the plug 21 will it be possible to retract the locking dog provided by the strip 17.

New with reference to the form of device shown in Fig. 7, it will be observed that the construction is substantially the same as that afore described with the additional feature however that the rear edge of the strip is formed with a hook portion 25 which when the parts are lockedcomes to lie to the rear of the face of the plate. bus, in addition to locking the cylinder against rotation, the possibility of a jimmy or other instru ment being employed to pull the cylinder by stripping the threads thereof will be obviated.

In the form of device shown in Figs. 8 and 9, a dog or strip 17 is actuated automatically by having the same formed with a tapered extension 26 which normally bears against the face of the plug. However, with a key in the slot of the latter, this plug may be turned to a point at which a recess 27 formed in the face thereof will accommodate the e:; tension 26 and in this position of the parts, it will be apparent that the dog will be re tracted so that the cylinder may be removed.

It is thus obvious that the diiiiculties heretofore experienced are avoided. More particular y, it will not be practicable to gain access to the screw 16 when the door is open and after loosening this screw, to unscrew the cylinder after the door is closed. With the cylinder removed, it is of course feasible to insert any desired implement to effect an ac tuation of the lock.

Thus, amon others, the vessel objects spe cifically afore referred to are achieved. It will be understood, however, that numerous changes in construction and rearrangement of the parts might be resorted to without departing from the spirit of the invention as defined by the claims.

Having described my invention what I claim as new, and desire to secure by Letters Patent, is:

1. A look including, in combination, a cylinder formed with a bore and a slot extending from said bore to the edge of said cylinder, a plate slidably positioned within said slot, a bulged portion forming a part of said plate and extending within said bore to retain said plate, and means for projecting the edge of the latter beyond the plane of said cylinder.

2. A lock including, in combination, a cylinder formed with a bore and a slot extending from said bore to the edge of said cylinder, a plate slidably positioned within said slot, a bulged portion forming a part of Said plate and extending within said bore to retain said plate, means for projecting the edge of the latter beyond the plane of said cylinder, and an extension forming a part of said plate for engagement with a mounting member for said cylinder.

3. A loclr including, in combination, a cylinder formed with a bore and a slot extending from said bore to the edge of said cylinder, a plate slidably positioned within said slot, a bulged portion forming a part of said plate and extending within said bore to retain said plate, and a plug positioned within said bore and engaging an inclined rear face f said plate to project the outer edge of the la tter beyond the plane of said cylinder.

A look including, in combination, a cylinder formed with a bore and a slot extending from said bore to the edge of said cylinder, a plate slidably positioned within said slot, a bulged portion forming a part of said plate and extending within said bore to retain said plate, a plug associated with said cylinder to receive a key, and means forming a part of said plate and plug and cooperating to extend the latter beyond the plane of the cylinder when the plug in certain positions.

5. A look including, in combination, a cylinder formed with a screw threaded bore, a screw positioned within said bore, a locking detent normally housed within the body of said cylinder but movable beyond the same. said screw being projectable within its bore into engagement with said detent to force the latter to extend beyond the body of said cylinder.

6. A lock including, in combination, a cylinder formed with a bore, a key plug rotatable within said cylinder, a locking detent pivotally mounted by said cylinder and extending in a retracted condition substantially parallel to the axis of said plug, and means forming a part of said plug and detent and acting to one side of the point of pivoting of the latter to swing said detent outwardly with respect to said cylinder under normal positions of said plug.

In testimony whereof I my signature.

JOHN HINES. 

